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GHSA-q264-w97q-q778

Denial of service via HAMT Decoding Panics

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-23625

Packages

EcosystemPackageAffectedFixed in
Go github.com/ipfs/go-unixfs < 0.4.3 0.4.3

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Trying to read malformed HAMT sharded directories can cause panics and virtual memory leaks. If you are reading untrusted user input, an attacker can then trigger a panic. This is caused by bogus `fanout` parameter in the HAMT directory nodes. This include checks returned in [ipfs/go-bitfield GHSA-2h6c-j3gf-xp9r](https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r), as well as limiting the `fanout` to `<= 1024` (to avoid attempts of arbitrary sized allocations). ### Patches - https://github.com/ipfs/go-unixfs/commit/dbcc43ec3e2db0d01e8d80c55040bba3cf22cb4b ### Workarounds Do not feed untrusted user data to the decoding functions. ### References - https://github.com/ipfs/go-bitfield/security/advisories/GHSA-2h6c-j3gf-xp9r

References

External links from the advisory. They lead to third-party sites.